sensor MERCEDES-BENZ CLK550 2008 C209 User Guide

274 Controls in detail
Driving systems
Switching the Parktronic system
on/off
The Parktronic system can be switched off
manually.
The Parktronic switch is located in the up-
per part of the center console.
1Parktronic switch
2Indicator lamp
Switching off the Parktronic system
Press Parktronic switch1.
Indicator lamp2 comes on.Switching on the Parktronic system
Press Parktronic switch1 again.
Indicator lamp2 goes out.
Parktronic system malfunction
If only the red distance segments illumi-
nate and a acoustic warning sounds,
there is a malfunction in the Parktronic
system. The Parktronic system will auto-
matically switch off after 20 seconds and
the indicator lamp in the Parktronic switch
comes on.
Have the Parktronic system checked at
an authorized Mercedes-Benz Center
as soon as possible.If only the red distance segments illumi-
nate and no acoustic warning sounds, the
Parktronic system sensors are dirty or
there is an interference from other radio or
ultrasonic signals. The Parktronic system
will automatically switch off after 20 sec-
onds and the indicator lamp in the Park-
tronic switch comes on.
Switch off the ignition (page 38).
Clean the Parktronic system sensors
(
page 372).
Switch on the ignition.
or
Check the Parktronic system operation
at another location to rule out interfer-
ence from outside radio or ultrasonic
signals.
iThe Parktronic system is automatically
switched on when the ignition is switched on
(
page 38).

318 Operation
Driving instructions
Telephones* and two-way radios
Radio transmitters, such as a mobile
phone or a citizens band unit should only
be used inside the vehicle if they are con-
nected to an antenna that is installed on
the outside of the vehicle.
Refer to the radio transmitter operation in-
structions regarding use of an external
antenna.Catalytic converter
Your Mercedes-Benz is equipped with
monolithic-type catalytic converters, an
important element in conjunction with the
oxygen sensors to achieve substantial con-
trol of the pollutants in the exhaust emis-
sions. Keep your vehicle in proper
operating condition by following our
recommended maintenance instructions
as outlined in your Maintenance Booklet.
Emission control
Certain systems of the engine serve to
keep the toxic components of the exhaust
gases within permissible limits required by
law.
These systems, of course, will function
properly only when maintained strictly ac-
cording to factory specifications. Any ad-
justments to the engine should therefore
be carried out only by qualified
Mercedes-Benz Center authorized techni-
cians.
Warning!G
Never operate radio transmitters equipped
with a built-in or attached antenna (i.e. with-
out being connected to an external antenna)
from inside the vehicle while the engine is
running. Doing so could lead to a malfunc-
tion of the vehicle’s electronic system, pos-
sibly resulting in an accident and/or serious
personal injury.
!To prevent damage to the catalytic
converters, only use premium unleaded gasoline
in this vehicle.
Any noticeable irregularities in engine operation
should be repaired promptly. Otherwise, exces-
sive unburned fuel may reach the catalytic con-
verter, causing it to overheat and potentially
start a fire.
Warning!G
As with any vehicle, do not idle, park or op-
erate this vehicle in areas where combusti-
ble materials such as grass, hay, or leaves
can come into contact with the hot exhaust
system, as these materials could be ignited
and cause a vehicle fire.

344 Operation
Tires and wheels
Checking tire pressure electronically
with the Tire Pressure Monitoring
System (TPMS), (USA only)
The TPMS only functions on wheels that
are equipped with the proper electronic
sensors. It monitors the tire inflation pres-
sure, as selected by the driver, in all four
tires. A warning is issued to alert you to a
decrease in pressure in one or more of the
tires.
iThe Tire Pressure Monitoring System
(TPMS) is equipped with a combination low tire
pressure/TPMS malfunction telltale in the
instrument cluster (
page 29). Depending on
how the telltale illuminates, it indicates a low tire
pressure condition or a malfunction in the TPMS
system itself:

If the telltale illuminates continuously, one
or more of your tires is significantly underin-
flated. There is no malfunction in the TPMS.

If the telltale flashes for 60 seconds and
then stays illuminated, the TPMS system
itself is not operating properly.
iThis device complies with Part 15 of the
FCC Rules. Operation is subject to the following
two conditions:
(1) This device may not cause harmful interfer-
ence, and
(2) this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this device
could void the user’s authority to operate the
equipment.Warning!G
The TPMS does not indicate a warning for
wrongly selected inflation pressures. Always
adjust tire inflation pressure according to
the Tire and Loading Information placard on
the driver’s door B-pillar or, if available, the
supplemental tire pressure information on
the inside of the fuel filler flap.
The TPMS is not able to issue a warning due
to a sudden dramatic loss of pressure (e.g.
tire blowout caused by a foreign object). In
this case bring the vehicle to a halt by care-
fully applying the brakes and avoiding
abrupt steering maneuvers.

370 Operation
Vehicle care
Soft top (CLK cabriolet)
Frequent cleaning reduces the
dirt-repellent effect of the soft top.
Intensive cleaning with Mercedes-Benz
car-care products for convertible soft tops
can help to restore the dirt-repellent
effect. Contact an authorized
Mercedes-Benz Center for detailed
information.
Light colored soft tops should be cleaned
frequently to prevent spots and dirt from
setting in, which could stain and discolor
the soft top material permanently.
Incorrect cleaning and care, as well as
ageing, can cause the soft-top seams to
leak. Have the soft-top seams sealed at a
Mercedes-Benz Center.!Make sure the windshield wiper switch is
set to0 (
page 56). Otherwise, e.g. the rain
sensor could activate and cause the wipers to
move unintentionally. This may lead to vehicle
damage.
Due to the width of the vehicle, fold in exterior
rear view mirrors prior to running the vehicle
through an automatic car wash to prevent
damage to the mirrors.
iAfter running the vehicle through an
automatic car wash, wipe any wax off of the
windshield (
page 373). This will prevent
smears and reduce wiping noise which can be
caused by residual wax on the windshield.
When leaving the car wash, make sure the mir-
rors are folded out. Otherwise they may vibrate.
iIf the soft top is kept in the storage
compartment for a lengthy period, raise it and air
out with the windows open about every
4months.
Place a suitable cover over the soft top if you are
leaving the vehicle parked in the open for an
extended period of time.
!Remove bird droppings immediately. The
organic acid damages the material and causes
the soft top to leak.
Never use a power washer to clean the soft top,
as you may damage the soft top material.
Do not use sharp-edged instruments for the
removal of ice and snow.
Never use hot-wax when you run the vehicle
through an automatic car wash, as you may
damage the soft top material.

372 Operation
Vehicle care
Ornamental moldings
For regular cleaning and care of
ornamental moldings, use a damp cloth.Headlamps, tail lamps, side markers,
turn signal lenses
Use a mild car wash detergent, such as
Mercedes-Benz approved Car
Shampoo, with plenty of water.Cleaning the Parktronic system*
sensors (CLK 63 AMG (USA), Canada all
vehicles)
1Parktronic system* sensors in front
bumper
Use a mild car wash detergent, such as
Mercedes-Benz approved Car
Shampoo, with plenty of water and a
soft, non-scratching cloth to clean
sensors1 on the bumpers.
!Do not use chrome cleaner on ornamental
moldings. Although ornamental moldings may
have chrome appearance, they could be made of
anodized aluminum that will be damaged when
cleaned with chrome cleaner. Instead, use a
damp cloth to clean those ornamental moldings.
For very dirty ornamental moldings of which you
are sure are chrome-plated, use a chrome
cleaner. If in doubt whether an ornamental
molding is chrome-plated, contact an authorized
Mercedes-Benz Center.
!Only use window cleaning solutions that are
suitable for plastic lamp lenses. Window
cleaning solutions which are not suitable may
damage the plastic lamp lenses of the
headlamps. Therefore, do not use abrasives,
solvents or cleaners that contain solvents.
Never apply strong force and only use a soft,
non-scratching cloth when cleaning the lenses.
Do not attempt to wipe dirty lenses with a dry
cloth or sponge.
Otherwise you may scratch or damage the lens
surface.

373 Operation
Vehicle care
Cleaning the windows and the wiper
blades
Make sure the hood is fully closed.
Make sure the vehicle’s on-board
electronics have status0 (
page 38).
Fold the wiper arms forward until they
snap into place.
Clean the wiper blade inserts with a
clean cloth and detergent solution.
Use a soft, clean cloth and a mild
window cleaning solution on all outside
and inside glass surfaces.
An automotive glass cleaner is
recommended.
!Do not apply strong pressure to the sensor
covers. Applying strong pressure may damage
the sensor covers.
Follow the instructions provided by the power
washer manufacturer on maintaining a distance
between the vehicle and the nozzle of the power
washer.
!To prevent scratches, never apply strong
force and only use a soft, non-scratching cloth
when cleaning the sensors. Do not attempt to
wipe dirty sensors with a dry cloth or sponge.
!Never open the hood when the wiper arms
are folded forward.
Warning!G
For safety reasons, switch off wipers and
remove SmartKey from starter switch
(vehicles with KEYLESS-GO*: Make sure the
vehicle's on-board electronics have
status0) before cleaning the windshield
and/or the wiper blades. Otherwise, the
wiper motor could suddenly turn on and
cause injury.
!Do not pull on the wiper blade inserts. They
could tear.
!Fold the windshield wiper arms back onto
the windshield before turning the SmartKey in
the starter switch or pressing the KEYLESS-GO
start/stop button (vehicles with KEYLESS-GO*).
Hold on to the wiper when folding the wiper arm
back. If released, the force of the impact from
the tensioning spring could crack the windshield.
!To clean the window interior, do not use a
dry cloth, abrasives, solvents or cleaners
containing solvents. Do not touch the inside of
the front, rear or side windows with hard objects
such as an ice scraper or ring. Doing so may
damage the windows.

401 Practical hints
What to do if …?
Display messagePossible cause/consequencePossible solution
Tire Pressure
Check TiresThe Run Flat Indicator indicates that
the pressure is too low in one or more
tires.Carefully bring the vehicle to a halt, avoiding
abrupt steering and braking maneuvers. Observe
the traffic situation around you.
Check and adjust tire inflation pressure as
required (
page 341).
If necessary, change the wheel (page 452).
Restart the Run Flat Indicator after adjusting the
tire inflation pressure values (
page 343).
Tire Pressure
Monitor
InoperativeThe TPMS is malfunctioning.Have the TPMS checked at an authorized
Mercedes-Benz Center.
Tire Pressure
Monitor
Inoperative
No Wheel SensorsThere are wheels without appropriate
wheel sensors mounted (e.g. winter
tires).Have the TPMS checked at an authorized
Mercedes-Benz Center.
Have the wheel sensors installed at an authorized
Mercedes-Benz Center.
Tire Pressure
Monitor
Currently UnavailableThe TPMS is unable to monitor the tire
pressure due to a nearby radio inter-
ference source.As soon as the causes of the malfunction have been
removed, the TPMS automatically becomes active
again after a few minutes of driving.

411 Practical hints
What to do if …?
Display symbolDisplay messagePossible cause/consequencePossible solution
I Please don’t
forget your keyThis display appears (for a maximum of
60 seconds) if the driver’s door is opened
with the engine shut off and no SmartKey in
the starter switch.
Message is only a reminder.Insert SmartKey in the starter switch.
Take the SmartKey with
KEYLESS-GO* with you when leaving
the vehicle.
Remove KeyYou have forgotten to remove the SmartKey.Remove the SmartKey from the start-
er switch.
. Active Headlamps
Auxiliary Bulb OnThe active headlamps are malfunctioning. An-
other light is being used.Contact an authorized Mercedes-Benz
Center as soon as possible.
Active Headlamps
InoperativeThe Bi-Xenon cornering lamps system is mal-
functioning.Contact an authorized Mercedes-Benz
Center as soon as possible.
AUTO-Light
InoperativeThe light sensor is malfunctioning. The head-
lamps switch on automatically.Contact an authorized Mercedes-Benz
Center as soon as possible.
To switch off the headlamps:
In the control system, set lamp opera-
tion to manual mode (
page 162).
Switch off the headlamps using the
exterior lamp switch (
page 129).
3rd
Brake LampThe high mounted brake lamp is malfunction-
ing. This message will only appear if a critical
number of LEDs have stopped working.Contact an authorized Mercedes-Benz
Center as soon as possible.

504 Index
G
Garage door opener 33, 301
Gasoline see Fuel
GAWR 358
Gear range
Automatic transmission 177
Limiting 177
Shifting into optimal 180, 182
Gear selector lever 51, 172
Cleaning 375
Gearshift pattern 172
Lock 52
Message in display 400
Position 173, 174
Position indicator 29, 141
Shifting procedure 173
Unlocking in an emergency 429
Gear selector lever one-touch gearshifting
Automatic transmission 179
Global locking/unlocking
see Key, SmartKey or KEYLESS-GO*
Glove box 285
Gloves 422
Good visibility 185
Gross Axle Weight Rating see GAWR
Gross Vehicle Weight Rating see GVWRGross Vehicle Weight see GVW
GVW 358
GVWR 359
H
Halogen headlamp see Headlamps
Hands-free microphone 33
Hard plastic trim items, cleaning 375
Hazard warning flasher 135
Head restraints 43, 120
Active head restraints 81
Front seat 120
Power seat, Adjusting 43
Rear seat 120, 123
Rear seat, Folding back 121
Rear seat, Lowering 123
Rear seat, Placing upright 122
Rear seat, Raising 123
Rear seat, Removing/installing 122
Headlamp
cleaning system* 185, 330, 496
Headlamp delayed shut-off see
Delayed shut-off, Exterior lampsHeadlamps
Automatic headlamp mode 130
Cleaning lenses 372
Daytime running lamp mode 131
Halogen 446
High beam see High beam flasher
High beam see High beam headlamps
Light sensor 411
Locator lighting 132
Low beam headlamps 130
Low beam see Low beam headlamps
Manual headlamp mode 130
Messages in display 411–415
Night security illumination 132
Replacing bulbs 444, 446
Switch 55, 129
Headliner and shelf below rear window,
Cleaning and care of 375
Head-thorax air bag 71
Heated seats* 125
High beam flasher 55, 133
Replacing bulbs (Bi-Xenon*) 444
Replacing bulbs (Halogen) 444

506 Index
K
Key, Mechanical 427
Key, SmartKey 100
Batteries 108
Battery check lamp 102, 107
Changing batteries 442
Factory setting 102, 103
Ignition 38
Locking/unlocking 36, 62, 100
Locking/unlocking,
Global setting 102
Locking/unlocking,
Selective setting 102
Loss of 109
Message in display 411
Opening and closing the
power tilt/sliding sunroof* 257
Opening and closing the
power windows 253
Opening and closing the soft top 263
Positions in starter switch 38
Remote control 100
SmartKey with KEYLESS-GO* 103
Starting the engine 52
Steering wheel lock 38
Turning off the engine 60Unlocking/opening trunk lid 103
KEYLESS-GO* 103
Battery check lamp, SmartKey 107
Factory setting 106, 108
Ignition 40
Important notes 105
Lock button 62
Locking/unlocking 37, 62, 103
Locking/unlocking,
Global setting 106
Locking/unlocking, Selective
setting 107
Loss of key 109
Messages in display 410
Remote control 103
Start / stop button 39
Starting the engine 52
Turning off the engine 60
Unlocking/opening trunk lid 108
Kickdown 176
Kilopascal 359L
Labels 478
Certification 478
Emission control information 479
Lamp sensor see Light sensor
Lamps, exterior 444
Light sensor 411
Messages in display 411–415
Lamps, indicator and warning
ABS 29, 378
Battery (SmartKey) 102, 107
Brakes 29, 380
Center console 390–391
CHECK ENGINE 381
Coolant 382
Coolant temperature 29, 139
Distance warning 29
Engine diagnostics 381
Engine malfunction 29, 381
ESP
®384
Fog lamps 132
Front passenger front air bag off 70
Front passenger front
air bag off indicator lamp 390
Fuel reserve 29, 385
High beam headlamp 29